dc.contributor.author | FLEMING, GARRY | en |
dc.date.accessioned | 2011-02-14T13:07:33Z | |
dc.date.available | 2011-02-14T13:07:33Z | |
dc.date.issued | 2011 | en |
dc.date.submitted | 2011 | en |
dc.identifier.citation | Isgro G, Addison O, Fleming GJP, The deformation and strength of a dental ceramic following resin-cement coating, Journal of Dentistry, 39, 2, 2011, 122 - 127 | en |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description.abstract | Objectives:
The hypothesis tested was that processing, pre-cementation and cementation techniques can modify the profilometrically measured deformation of a ceramic.
Methods:
Three-point flexural moduli of a resin-cement were characterised following light irradiation at 430 and 180 mWcm-2. Thirty IPS e.max Ceram discs were prepared and a reference surface produced by polishing. Discs were annealed, alumina particle air abraded and resin-coated. Profilometric evaluation was performed following each pre-cementation or cementation operative technique using a contact diamond stylus profilometer. Bi-axial flexure strength of the resin-coated discs, light irradiated at 430 and 180 mWcm-2 (Groups A and B), and the un-coated discs (Group C) was determined. Data were analysed by a one-way analysis of variance with post-hoc Tukey tests (P < 0.05), or repeat measure analyses when appropriate.
Results:
Annealing (at 510degC for 40 mins) resulted in a significant reduction (P < 0.001) in the characterised mean deflection, as did alumina particle air-abrasion (P < 0.001). Resin-cement coating significantly increased the mean deflection for Group A and B (P < 0.001) specimens against the uncoated state. Furthermore no significant impact of increasing time or irradiation intensity on the mean deflection was identified. The mean bi-axial flexure strength was significantly increased (P < 0.001) after resin-coating (Groups A and B) when compared with Group C specimens although no difference between Groups A and B specimens (P = 0.291) was identified.
Conslusion:
The results of the profilometric technique in combination with the strength supported a strengthening mechanism sensitive to shrinkage stress generation associated with the polymerisation of resin-cements. | en |
dc.format.extent | 122 | en |
dc.format.extent | 127 | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Journal of Dentistry | en |
dc.relation.ispartofseries | 39 | en |
dc.relation.ispartofseries | 2 | en |
dc.rights | Y | en |
dc.subject | Dental Science | en |
dc.subject | transient and residual stresses | en |
dc.subject | profilometric technique | en |
dc.title | The deformation and strength of a dental ceramic following resin-cement coating | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/flemingg | en |
dc.identifier.rssinternalid | 69391 | en |
dc.identifier.uri | http://hdl.handle.net/2262/50543 | |